This little addon lets you import multiple files.
You can import as many files as you like at the same time, regardless of file type.
Files supported: *.fbx*.obj;*.abc;*.stl;*.svg;*.gltf;*.dae;*usd;*usda;*usdc;*bvh
Install it like any other addon.
Enjoy, and if you liked it, please support me !
(If you want to modify it, make it better, and make a patch for Blender, feel free to do it !)